[RE-wrenches] Charging AGM Batteries

[Walt Ratterman]

Peter,

 

The DEKA charging manual that I have been working from for their sealed
batteries (AGM and Gel) quote 30% of C20.

 

And
.DEKA’s literature also has a maximum charging voltage of 2.35 VPC.

 

Not sure about the other brands.

 

Thanks,

 

Walt

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Peter
Parrish
Sent: Tuesday, September 15, 2009 7:33 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] Charging AGM Batteries

 

I have been told that AGM batteries can withstand pretty aggressive charging
rates, with a bulk rate being ½ of C/20. For example a MK 8A8D, with a C/20
of 245 A-h, would start with 122 A. If this is okay, can I still use the
standard 14.6 V value for switching from Bulk to Absorb? What about ambient
temperature effects at high charge rates?

 

We have need from time to time to charge AGMs as quickly as we can safely do
so, so any information on high charge rates would be appreciated.

 

- Peter

 




Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP TM Cert. 031806-26
peter.parrish at calsolareng.com  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


  

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